Email delivery for web apps.
http://postmarkapp.com
Email Hosting Providers · Transactional Email
Get access to data on 53,160 websites that are Postmark Customers. We know of 33,221 live websites using Postmark and an additional 19,939 sites that used Postmark historically and 16,545 websites in the United States.
Get a list of 53,160 websites using Postmark which includes location information, hosting data, contact details, 33,221 currently live websites and an additional 83,041 domains that redirect to sites in this list. 19,939 sites that used this technology previously and 16,545 websites in the United States currently using Postmark.